`error 057: unfinished expression before compiler directive`

[Y-Less]

Issue description:

It would be very nice if the following would work:

Minimal complete verifiable example (MCVE):

#define AA 1

main()
{
	new a =
		#if AA
			5;
		#else
			6;
		#endif
}

Workspace Information:

• Compiler version:
• Command line arguments provided (or sampctl version):
• Operating System:

[Y-Less]

This works:

	return
		#if AA
			5,
		#else
			6,
		#endif
		7;

This doesn't:

	return
		7,
		#if AA
			5
		#else
			6
		#endif
		;

Nor does:

	return
		7,
		#if AA
			5;
		#else
			6;
		#endif